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Heterogeneous Nodes in a Mobile Ad Hoc NET-work(MANET) are having very constrained resources like memory, bandwidth, CPU speed, battery life etc. Here, Heterogeneous Nodes means, all/few nodes are having variety of functionality. Irrespective of having higher secured nodes and security algorithms in MANETs, some time, the honest nodes can be accessed by fraud/malicious nodes or simply attacked by...
Throughput scaling laws for two coexisting ad hoc networks with m primary users (PUs) and n secondary users (SUs) randomly distributed in an unit area has been widely studied. Early work showed that the secondary network performs as well as stand-alone networks, namely, the per-node throughput of the secondary networks is equation. In this paper, we show that by exploiting directional spectrum opportunities...
We derive the throughput of an energy-constrained mobile network, where wireless charging vehicles recharge the battery of each mobile node. We find that the throughput is closely related to the ratio between the number of nodes n and the number of wireless charging vehicles m. Through analytic and numerical results, we show that the scaling law of the throughput is Θ(min(1, \frac{m}{n})c^min(1,\frac{m{n})}),...
We study the problem of broadcasting in energy constrained stationary wireless ad hoc networks so as to maximize network lifetime. Here, network lifetime implies the number of successive broadcast sessions that can be supported in a given wireless ad hoc network. We assume that each node in the network is equipped with a single omnidirectional antenna and capable of participating in cooperative transmission...
In this paper, an energy efficient adaptive modulation scheme is proposed for a wireless cognitive radio ad hoc network, where each node is equipped with cognitive radio and the network is an OFDMA system operating on time slots. In each slot, the users with new traffic demand will sense the spectrum and locate the available subcarrier set. Then they choose subcarriers with favorable channel condition...
This paper presents a distributed fermat-point range estimation strategy, which is important in the moving sensor localization applications. The fermat-point is defined as a point which minimizes the sum of distances from three sensors inside a triangle. This point is indeed at the trianglepsilas center of gravity. We solve the problems of large errors and poor performance in the bounding box algorithm...
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